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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
776338e1 JS |
2 | /* dvb-usb-remote.c is part of the DVB USB library. |
3 | * | |
99e44da7 | 4 | * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.de) |
776338e1 JS |
5 | * see dvb-usb-init.c for copyright information. |
6 | * | |
59c51591 | 7 | * This file contains functions for initializing the input-device and for handling remote-control-queries. |
776338e1 JS |
8 | */ |
9 | #include "dvb-usb-common.h" | |
4fcd7d8f | 10 | #include <linux/usb/input.h> |
776338e1 | 11 | |
f06e6a52 DT |
12 | static unsigned int |
13 | legacy_dvb_usb_get_keymap_index(const struct input_keymap_entry *ke, | |
14 | struct rc_map_table *keymap, | |
15 | unsigned int keymap_size) | |
16 | { | |
17 | unsigned int index; | |
18 | unsigned int scancode; | |
19 | ||
20 | if (ke->flags & INPUT_KEYMAP_BY_INDEX) { | |
21 | index = ke->index; | |
22 | } else { | |
23 | if (input_scancode_to_scalar(ke, &scancode)) | |
24 | return keymap_size; | |
25 | ||
26 | /* See if we can match the raw key code. */ | |
27 | for (index = 0; index < keymap_size; index++) | |
28 | if (keymap[index].scancode == scancode) | |
29 | break; | |
30 | ||
31 | /* See if there is an unused hole in the map */ | |
32 | if (index >= keymap_size) { | |
33 | for (index = 0; index < keymap_size; index++) { | |
34 | if (keymap[index].keycode == KEY_RESERVED || | |
35 | keymap[index].keycode == KEY_UNKNOWN) { | |
36 | break; | |
37 | } | |
38 | } | |
39 | } | |
40 | } | |
41 | ||
42 | return index; | |
43 | } | |
44 | ||
6520342b | 45 | static int legacy_dvb_usb_getkeycode(struct input_dev *dev, |
f06e6a52 | 46 | struct input_keymap_entry *ke) |
b77f0a76 MCC |
47 | { |
48 | struct dvb_usb_device *d = input_get_drvdata(dev); | |
2f4f58d6 | 49 | struct rc_map_table *keymap = d->props.rc.legacy.rc_map_table; |
f06e6a52 DT |
50 | unsigned int keymap_size = d->props.rc.legacy.rc_map_size; |
51 | unsigned int index; | |
b77f0a76 | 52 | |
f06e6a52 DT |
53 | index = legacy_dvb_usb_get_keymap_index(ke, keymap, keymap_size); |
54 | if (index >= keymap_size) | |
55 | return -EINVAL; | |
a4c1cbc7 | 56 | |
f06e6a52 DT |
57 | ke->keycode = keymap[index].keycode; |
58 | if (ke->keycode == KEY_UNKNOWN) | |
59 | ke->keycode = KEY_RESERVED; | |
60 | ke->len = sizeof(keymap[index].scancode); | |
61 | memcpy(&ke->scancode, &keymap[index].scancode, ke->len); | |
62 | ke->index = index; | |
a4c1cbc7 | 63 | |
f06e6a52 | 64 | return 0; |
b77f0a76 MCC |
65 | } |
66 | ||
6520342b | 67 | static int legacy_dvb_usb_setkeycode(struct input_dev *dev, |
f06e6a52 DT |
68 | const struct input_keymap_entry *ke, |
69 | unsigned int *old_keycode) | |
b77f0a76 MCC |
70 | { |
71 | struct dvb_usb_device *d = input_get_drvdata(dev); | |
2f4f58d6 | 72 | struct rc_map_table *keymap = d->props.rc.legacy.rc_map_table; |
f06e6a52 DT |
73 | unsigned int keymap_size = d->props.rc.legacy.rc_map_size; |
74 | unsigned int index; | |
b77f0a76 | 75 | |
f06e6a52 | 76 | index = legacy_dvb_usb_get_keymap_index(ke, keymap, keymap_size); |
b77f0a76 MCC |
77 | /* |
78 | * FIXME: Currently, it is not possible to increase the size of | |
79 | * scancode table. For it to happen, one possibility | |
80 | * would be to allocate a table with key_map_size + 1, | |
81 | * copying data, appending the new key on it, and freeing | |
82 | * the old one - or maybe just allocating some spare space | |
83 | */ | |
f06e6a52 DT |
84 | if (index >= keymap_size) |
85 | return -EINVAL; | |
86 | ||
87 | *old_keycode = keymap[index].keycode; | |
88 | keymap->keycode = ke->keycode; | |
89 | __set_bit(ke->keycode, dev->keybit); | |
90 | ||
91 | if (*old_keycode != KEY_RESERVED) { | |
92 | __clear_bit(*old_keycode, dev->keybit); | |
93 | for (index = 0; index < keymap_size; index++) { | |
94 | if (keymap[index].keycode == *old_keycode) { | |
95 | __set_bit(*old_keycode, dev->keybit); | |
96 | break; | |
97 | } | |
98 | } | |
99 | } | |
b77f0a76 | 100 | |
f06e6a52 | 101 | return 0; |
b77f0a76 MCC |
102 | } |
103 | ||
776338e1 JS |
104 | /* Remote-control poll function - called every dib->rc_query_interval ms to see |
105 | * whether the remote control has received anything. | |
106 | * | |
107 | * TODO: Fix the repeat rate of the input device. | |
108 | */ | |
6520342b | 109 | static void legacy_dvb_usb_read_remote_control(struct work_struct *work) |
776338e1 | 110 | { |
c4028958 DH |
111 | struct dvb_usb_device *d = |
112 | container_of(work, struct dvb_usb_device, rc_query_work.work); | |
776338e1 JS |
113 | u32 event; |
114 | int state; | |
115 | ||
116 | /* TODO: need a lock here. We can simply skip checking for the remote control | |
117 | if we're busy. */ | |
118 | ||
c9b06fa4 PB |
119 | /* when the parameter has been set to 1 via sysfs while the driver was running */ |
120 | if (dvb_usb_disable_rc_polling) | |
121 | return; | |
122 | ||
f72a27b8 | 123 | if (d->props.rc.legacy.rc_query(d,&event,&state)) { |
776338e1 JS |
124 | err("error while querying for an remote control event."); |
125 | goto schedule; | |
126 | } | |
127 | ||
128 | ||
129 | switch (state) { | |
130 | case REMOTE_NO_KEY_PRESSED: | |
131 | break; | |
132 | case REMOTE_KEY_PRESSED: | |
133 | deb_rc("key pressed\n"); | |
134 | d->last_event = event; | |
39c4806e MCC |
135 | input_event(d->input_dev, EV_KEY, event, 1); |
136 | input_sync(d->input_dev); | |
137 | input_event(d->input_dev, EV_KEY, d->last_event, 0); | |
138 | input_sync(d->input_dev); | |
139 | break; | |
776338e1 JS |
140 | case REMOTE_KEY_REPEAT: |
141 | deb_rc("key repeated\n"); | |
d8b4b582 DH |
142 | input_event(d->input_dev, EV_KEY, event, 1); |
143 | input_sync(d->input_dev); | |
144 | input_event(d->input_dev, EV_KEY, d->last_event, 0); | |
145 | input_sync(d->input_dev); | |
776338e1 JS |
146 | break; |
147 | default: | |
148 | break; | |
149 | } | |
150 | ||
151 | /* improved repeat handling ??? | |
152 | switch (state) { | |
153 | case REMOTE_NO_KEY_PRESSED: | |
154 | deb_rc("NO KEY PRESSED\n"); | |
155 | if (d->last_state != REMOTE_NO_KEY_PRESSED) { | |
156 | deb_rc("releasing event %d\n",d->last_event); | |
b7df3910 DT |
157 | input_event(d->rc_input_dev, EV_KEY, d->last_event, 0); |
158 | input_sync(d->rc_input_dev); | |
776338e1 JS |
159 | } |
160 | d->last_state = REMOTE_NO_KEY_PRESSED; | |
161 | d->last_event = 0; | |
162 | break; | |
163 | case REMOTE_KEY_PRESSED: | |
164 | deb_rc("KEY PRESSED\n"); | |
165 | deb_rc("pressing event %d\n",event); | |
166 | ||
b7df3910 DT |
167 | input_event(d->rc_input_dev, EV_KEY, event, 1); |
168 | input_sync(d->rc_input_dev); | |
776338e1 JS |
169 | |
170 | d->last_event = event; | |
171 | d->last_state = REMOTE_KEY_PRESSED; | |
172 | break; | |
173 | case REMOTE_KEY_REPEAT: | |
174 | deb_rc("KEY_REPEAT\n"); | |
175 | if (d->last_state != REMOTE_NO_KEY_PRESSED) { | |
176 | deb_rc("repeating event %d\n",d->last_event); | |
b7df3910 DT |
177 | input_event(d->rc_input_dev, EV_KEY, d->last_event, 2); |
178 | input_sync(d->rc_input_dev); | |
776338e1 JS |
179 | d->last_state = REMOTE_KEY_REPEAT; |
180 | } | |
181 | default: | |
182 | break; | |
183 | } | |
184 | */ | |
185 | ||
186 | schedule: | |
f72a27b8 | 187 | schedule_delayed_work(&d->rc_query_work,msecs_to_jiffies(d->props.rc.legacy.rc_interval)); |
776338e1 JS |
188 | } |
189 | ||
d8b4b582 | 190 | static int legacy_dvb_usb_remote_init(struct dvb_usb_device *d) |
6520342b MCC |
191 | { |
192 | int i, err, rc_interval; | |
d8b4b582 DH |
193 | struct input_dev *input_dev; |
194 | ||
195 | input_dev = input_allocate_device(); | |
196 | if (!input_dev) | |
197 | return -ENOMEM; | |
198 | ||
199 | input_dev->evbit[0] = BIT_MASK(EV_KEY); | |
200 | input_dev->name = "IR-receiver inside an USB DVB receiver"; | |
201 | input_dev->phys = d->rc_phys; | |
202 | usb_to_input_id(d->udev, &input_dev->id); | |
203 | input_dev->dev.parent = &d->udev->dev; | |
204 | d->input_dev = input_dev; | |
205 | d->rc_dev = NULL; | |
6520342b | 206 | |
aebd636b DT |
207 | input_dev->getkeycode = legacy_dvb_usb_getkeycode; |
208 | input_dev->setkeycode = legacy_dvb_usb_setkeycode; | |
6520342b MCC |
209 | |
210 | /* set the bits for the keys */ | |
2f4f58d6 MCC |
211 | deb_rc("key map size: %d\n", d->props.rc.legacy.rc_map_size); |
212 | for (i = 0; i < d->props.rc.legacy.rc_map_size; i++) { | |
6520342b | 213 | deb_rc("setting bit for event %d item %d\n", |
2f4f58d6 MCC |
214 | d->props.rc.legacy.rc_map_table[i].keycode, i); |
215 | set_bit(d->props.rc.legacy.rc_map_table[i].keycode, input_dev->keybit); | |
6520342b MCC |
216 | } |
217 | ||
218 | /* setting these two values to non-zero, we have to manage key repeats */ | |
219 | input_dev->rep[REP_PERIOD] = d->props.rc.legacy.rc_interval; | |
220 | input_dev->rep[REP_DELAY] = d->props.rc.legacy.rc_interval + 150; | |
221 | ||
222 | input_set_drvdata(input_dev, d); | |
223 | ||
224 | err = input_register_device(input_dev); | |
225 | if (err) | |
226 | input_free_device(input_dev); | |
227 | ||
228 | rc_interval = d->props.rc.legacy.rc_interval; | |
229 | ||
230 | INIT_DELAYED_WORK(&d->rc_query_work, legacy_dvb_usb_read_remote_control); | |
231 | ||
232 | info("schedule remote query interval to %d msecs.", rc_interval); | |
233 | schedule_delayed_work(&d->rc_query_work, | |
234 | msecs_to_jiffies(rc_interval)); | |
235 | ||
236 | d->state |= DVB_USB_STATE_REMOTE; | |
237 | ||
238 | return err; | |
239 | } | |
240 | ||
241 | /* Remote-control poll function - called every dib->rc_query_interval ms to see | |
242 | * whether the remote control has received anything. | |
243 | * | |
244 | * TODO: Fix the repeat rate of the input device. | |
245 | */ | |
246 | static void dvb_usb_read_remote_control(struct work_struct *work) | |
247 | { | |
248 | struct dvb_usb_device *d = | |
249 | container_of(work, struct dvb_usb_device, rc_query_work.work); | |
250 | int err; | |
251 | ||
252 | /* TODO: need a lock here. We can simply skip checking for the remote control | |
253 | if we're busy. */ | |
254 | ||
255 | /* when the parameter has been set to 1 via sysfs while the | |
256 | * driver was running, or when bulk mode is enabled after IR init | |
257 | */ | |
258 | if (dvb_usb_disable_rc_polling || d->props.rc.core.bulk_mode) | |
259 | return; | |
260 | ||
261 | err = d->props.rc.core.rc_query(d); | |
262 | if (err) | |
263 | err("error %d while querying for an remote control event.", err); | |
264 | ||
265 | schedule_delayed_work(&d->rc_query_work, | |
266 | msecs_to_jiffies(d->props.rc.core.rc_interval)); | |
267 | } | |
268 | ||
d8b4b582 | 269 | static int rc_core_dvb_usb_remote_init(struct dvb_usb_device *d) |
6520342b MCC |
270 | { |
271 | int err, rc_interval; | |
d8b4b582 DH |
272 | struct rc_dev *dev; |
273 | ||
0f7499fd | 274 | dev = rc_allocate_device(d->props.rc.core.driver_type); |
d8b4b582 DH |
275 | if (!dev) |
276 | return -ENOMEM; | |
6520342b | 277 | |
d8b4b582 DH |
278 | dev->driver_name = d->props.rc.core.module_name; |
279 | dev->map_name = d->props.rc.core.rc_codes; | |
280 | dev->change_protocol = d->props.rc.core.change_protocol; | |
c5540fbb | 281 | dev->allowed_protocols = d->props.rc.core.allowed_protos; |
d8b4b582 | 282 | usb_to_input_id(d->udev, &dev->input_id); |
518f4b26 | 283 | dev->device_name = "IR-receiver inside an USB DVB receiver"; |
d8b4b582 DH |
284 | dev->input_phys = d->rc_phys; |
285 | dev->dev.parent = &d->udev->dev; | |
286 | dev->priv = d; | |
287 | ||
288 | err = rc_register_device(dev); | |
289 | if (err < 0) { | |
290 | rc_free_device(dev); | |
6520342b | 291 | return err; |
d8b4b582 DH |
292 | } |
293 | ||
294 | d->input_dev = NULL; | |
295 | d->rc_dev = dev; | |
6520342b MCC |
296 | |
297 | if (!d->props.rc.core.rc_query || d->props.rc.core.bulk_mode) | |
298 | return 0; | |
299 | ||
300 | /* Polling mode - initialize a work queue for handling it */ | |
301 | INIT_DELAYED_WORK(&d->rc_query_work, dvb_usb_read_remote_control); | |
302 | ||
303 | rc_interval = d->props.rc.core.rc_interval; | |
304 | ||
305 | info("schedule remote query interval to %d msecs.", rc_interval); | |
306 | schedule_delayed_work(&d->rc_query_work, | |
307 | msecs_to_jiffies(rc_interval)); | |
308 | ||
309 | return 0; | |
310 | } | |
311 | ||
776338e1 JS |
312 | int dvb_usb_remote_init(struct dvb_usb_device *d) |
313 | { | |
b07b4783 | 314 | int err; |
b7df3910 | 315 | |
6520342b MCC |
316 | if (dvb_usb_disable_rc_polling) |
317 | return 0; | |
318 | ||
2f4f58d6 | 319 | if (d->props.rc.legacy.rc_map_table && d->props.rc.legacy.rc_query) |
6520342b MCC |
320 | d->props.rc.mode = DVB_RC_LEGACY; |
321 | else if (d->props.rc.core.rc_codes) | |
322 | d->props.rc.mode = DVB_RC_CORE; | |
323 | else | |
776338e1 JS |
324 | return 0; |
325 | ||
b7df3910 | 326 | usb_make_path(d->udev, d->rc_phys, sizeof(d->rc_phys)); |
4fcd7d8f | 327 | strlcat(d->rc_phys, "/ir0", sizeof(d->rc_phys)); |
b7df3910 | 328 | |
776338e1 | 329 | /* Start the remote-control polling. */ |
f72a27b8 MCC |
330 | if (d->props.rc.legacy.rc_interval < 40) |
331 | d->props.rc.legacy.rc_interval = 100; /* default */ | |
776338e1 | 332 | |
6520342b | 333 | if (d->props.rc.mode == DVB_RC_LEGACY) |
d8b4b582 | 334 | err = legacy_dvb_usb_remote_init(d); |
6520342b | 335 | else |
d8b4b582 | 336 | err = rc_core_dvb_usb_remote_init(d); |
6520342b MCC |
337 | if (err) |
338 | return err; | |
776338e1 JS |
339 | |
340 | d->state |= DVB_USB_STATE_REMOTE; | |
341 | ||
342 | return 0; | |
343 | } | |
344 | ||
345 | int dvb_usb_remote_exit(struct dvb_usb_device *d) | |
346 | { | |
347 | if (d->state & DVB_USB_STATE_REMOTE) { | |
afe2c511 | 348 | cancel_delayed_work_sync(&d->rc_query_work); |
6520342b | 349 | if (d->props.rc.mode == DVB_RC_LEGACY) |
d8b4b582 | 350 | input_unregister_device(d->input_dev); |
6520342b | 351 | else |
d8b4b582 | 352 | rc_unregister_device(d->rc_dev); |
776338e1 JS |
353 | } |
354 | d->state &= ~DVB_USB_STATE_REMOTE; | |
355 | return 0; | |
356 | } | |
357 | ||
358 | #define DVB_USB_RC_NEC_EMPTY 0x00 | |
359 | #define DVB_USB_RC_NEC_KEY_PRESSED 0x01 | |
360 | #define DVB_USB_RC_NEC_KEY_REPEATED 0x02 | |
361 | int dvb_usb_nec_rc_key_to_event(struct dvb_usb_device *d, | |
362 | u8 keybuf[5], u32 *event, int *state) | |
363 | { | |
364 | int i; | |
2f4f58d6 | 365 | struct rc_map_table *keymap = d->props.rc.legacy.rc_map_table; |
776338e1 JS |
366 | *event = 0; |
367 | *state = REMOTE_NO_KEY_PRESSED; | |
368 | switch (keybuf[0]) { | |
369 | case DVB_USB_RC_NEC_EMPTY: | |
370 | break; | |
371 | case DVB_USB_RC_NEC_KEY_PRESSED: | |
372 | if ((u8) ~keybuf[1] != keybuf[2] || | |
373 | (u8) ~keybuf[3] != keybuf[4]) { | |
374 | deb_err("remote control checksum failed.\n"); | |
375 | break; | |
376 | } | |
377 | /* See if we can match the raw key code. */ | |
2f4f58d6 | 378 | for (i = 0; i < d->props.rc.legacy.rc_map_size; i++) |
2e365883 MCC |
379 | if (rc5_custom(&keymap[i]) == keybuf[1] && |
380 | rc5_data(&keymap[i]) == keybuf[3]) { | |
34abf219 | 381 | *event = keymap[i].keycode; |
776338e1 | 382 | *state = REMOTE_KEY_PRESSED; |
1df896aa | 383 | return 0; |
776338e1 JS |
384 | } |
385 | deb_err("key mapping failed - no appropriate key found in keymapping\n"); | |
386 | break; | |
387 | case DVB_USB_RC_NEC_KEY_REPEATED: | |
388 | *state = REMOTE_KEY_REPEAT; | |
389 | break; | |
390 | default: | |
af901ca1 | 391 | deb_err("unknown type of remote status: %d\n",keybuf[0]); |
776338e1 JS |
392 | break; |
393 | } | |
394 | return 0; | |
395 | } | |
396 | EXPORT_SYMBOL(dvb_usb_nec_rc_key_to_event); |